Search phrase that was used: how many calories in an onionOur Comments: Depends on the onion. A 'regular' cooked onion has 35 calories per 100 grams. A red cooked onion has 49 calories per 150 grams. A cooked spring onion has 23 calories per 100 grams. The usual disclaimers apply. Your mileage may vary. Entered on: 2009-11-17 |